{"product_id":"the-original-triangle-flash-cards-addition-subtraction-set-of-20","title":"The Original Triangle Flash Cards - Addition \u0026 Subtraction - Set of 20","description":"\u003cp\u003eEliminate memory overload and learn 4 math facts on each side of a card! Triangle Flash Cards teach families of facts, showing the relationship between addition and subtraction. How is 4 in one corner related to 7 and 3 in the other corners? For 2 or more players. Each card displays eight problems - four are addition and four are subtraction. Relationship between addition and subtraction facts is emphasized. Students will gain efficiency in memorizing. Cards permit individualization of drill without changing cards. A harder fact is printed on one side of a card and an easier fact is printed on the other side. Includes variations in activities. Supports state and national mathematics standards. Each set includes 20 cards and instructions.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Learning Advantage®","offers":[{"title":"Default Title","offer_id":44315414888501,"sku":"CRE4551","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/5180\/9077\/files\/ERSCRE4551.jpg?v=1738819305","url":"https:\/\/esschoolsupply.com\/products\/the-original-triangle-flash-cards-addition-subtraction-set-of-20","provider":"ES School Supply","version":"1.0","type":"link"}